JPS63116997A - Ship drive - Google Patents

Abstract

A marine drive apparatus (1) including a shroud channel (7) selectively rotatable to direct the water produced by a rotatable propeller (4) so as to provide reversing and steering of a marine craft. The shroud channel (7) has spaced side walls (8, 9) joined by a roof portion (10), the side walls (8, 9) being used to deflect the water flow so as to produce a steering thrust and the roof portion (10) being movable aft of the propeller (4) to deflect the water flow and produce a reverse thrust.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to marine vessel drive systems and to achieving reverse propulsion as well as steering.

Prior art shaft and pinch propeller type marine drives typically achieve reversibility through complex mechanisms that reverse the rotation of the propeller. This type of rugged equipment has an undesirable size and weight for the intended application. The steering system requires separate rudder means.

PROBLEM TO BE SOLVED BY THE INVENTION It is an object of the invention to provide reversible and steerable propulsion by relatively simple, lightweight and robust means.

Means for Solving the Problems According to the invention, a marine vessel drive device is provided which has a reversible and steering channel that at least partially covers a rotatable propeller and controls the water flow produced by said propeller. wherein the channel member in the forward-propelled configuration has spaced side walls joined by a roof portion and is rotatable about a substantially vertical first axis for steering or reverse propulsion. The roof portion may be moved to the rear of the propeller so as to rotate about a substantially horizontal second axis, and the channel intercepts and redirects the water flow. A device is provided to do this.

Preferably said roof section has inwardly directed deflection means located at least at the rear end to provide greater reverse propulsion.

The invention will now be described, by way of example only, with reference to the accompanying drawings, in which: FIG.

Referring to the embodiment drawings, the ship drive device 1 is attached to a propeller shaft housing 2 by a tree-shaped mounting bracket 3.
Shown attached to. The propeller 4 may be of the surface traveling type so that the vessel operates between a low water level approximately indicated at 5 and a high water level approximately indicated at 6.

The drive has a channel member 7 with spaced side walls 8 and 9 joined by a roof section 10. The channel 7 can be rotated about a substantially vertical first axis 1) or about a substantially horizontal second axis 12 in a manner as described below.

The channel member 7 partially covers the propeller 4 and controls the direction of the water flow. by steering by rotation about a substantially vertical axis 1) and moving the channel from the forward configuration shown in FIGS. 1 to 3 to the retracted configuration shown in FIGS. 4 and 5, Reverse propulsion by rotation about a substantially horizontal axis. In the retracted configuration, the roof section 10 moves to a rear position of the propeller so that the channel 7 can intercept the flow and redirect the flow to obtain the required reverse propulsion. Providing inwardly facing deflector vanes helps to divert water flow aside and increase reverse propulsion.

The desired rotation about the two axes can be achieved by suitable means. A preferred embodiment is shown somewhat schematically in FIG.

In this embodiment, the drive device is supported by a solid bearing sleeve 16, which is rigidly fixed to the mounting bracket 3 by a rearwardly projecting support arm 17. A cylindrical ladder post 18 whose top is rigidly connected to a lateral support beam 19 connects the bearing sleeve 16.
and is coaxial with a substantially vertical steering axis 1). A steering arm 20 extends forward from the support beam 19. Conventional steering means attached to the steering arm rotate the transverse support beam about axis 1).

Each end of the lateral support beam 19 is rigidly connected to a downwardly extending channel pivot arm 21. The lower end of each pivot arm 21 is pivotally engaged by a pin 22 which is fixedly secured to the side wall 8 of the channel by a bracket 23.

FIG. 1 shows the port pivot arm 21 engaging the side wall 8 of the port channel. On the starboard side of the support beam 19, a pair of coaxial pivot pins 22 align the substantially horizontal axis 12.
Although not shown, there is a symmetrically identical form to constitute the .

Each channel side wall bracket 23 also includes a rigid crank arm 24. A port tilt link 25 and a starboard tilt link 26 are each rotatably engaged with each crank arm by a coaxial pivot pin 27. The crank arm may be replaced by a pivot pin 23 which, like the pivot pin 22, is directly connected to the channel.

The upper end of each inclined link is connected to the transverse beam 28 by a hinge pin 29.
is connected to. The center of the cross beam is connected to a piston rod 30 and a piston 31, the piston 31 sliding in a cylinder 32 constituted by the inner surface of the rotatable rudder post 18. By conventional means, hydraulic fluid is supplied to the required sides of the piston 31 through valve ports (not shown) and through the walls of the bearing sleeve 16 and rudder post 18. As shown, three O-ring seals 14 are located between the solid bearing sleeve 16 and the cylindrical ladder post 18 at the center and at both ends of the ladder post. This O
- A ring seal separates the flow of hydraulic fluid through ports each placed between three seals.

Actuation of the piston 31 causes the crossbeam 28 to rise and fall, thereby displacing the tilting link and rotating the channel about the substantially horizontal axis 12 as described above. This rotation is obtained without interfering with the steering function achieved by rotation about a substantially vertical axis 1).

This axis may be vertical or suitably inclined as shown.

Although the invention has been described with reference to specific examples, it will be appreciated that the invention may be practiced in other forms within the scope of the appended claims.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional side view showing the channel member in the forward position of the boat drive system according to the present invention, FIG. 2 is a schematic diagram of the configuration of the channel member shown in FIG. 1, and FIG. The end view of the device shown in Figure 2 is seen from the rear, and Figure 4 is the same as Figures 1 and 2.
FIG. 5 is a plan view of the reverse propulsion configuration shown in FIG. 4; 4...Propeller, 7...Groove member, 8.9.
... Side wall, 10... Roof portion, 1)... First axis line, 12... Second axis line.

Claims (8)

[Claims] (1) A marine vessel drive having a reversible and steering channel that at least partially covers a rotatable propeller to control the water flow produced by the propeller, the channel in the forward configuration being driven by a roof portion. having joined spaced-apart sidewalls and rotating about a substantially horizontal second axis for rotation about a substantially vertical first axis for steering or for providing counterpropulsion; The device is characterized in that the roof portion can be moved to the rear of the propeller so that the channel-shaped member intercepts and changes the direction of the water flow. (2) The boat drive device according to claim 1, characterized in that the roof part has inwardly directed deflecting means located at least at the rear for providing a large reverse propulsion. . (3) The boat drive device according to claim 2, wherein the deflecting means includes a pair of blades placed at the front end and the rear end of the roof portion, respectively. (4) The first axis is defined by a cylindrical rudder post rotatably mounted on coaxial bearings adapted to be rigidly attached to the ship. Ship drive device as described in paragraph. (5) The marine vessel drive device according to claim (4), wherein the rotation about the second axis is achieved by a hydraulically actuable piston coaxial with the rudder post. (6) The piston is connected to a horizontal cross beam rotatably connected at both ends, and each link has both ends connected to the second
The boat drive device according to claim 5, wherein the boat drive device is connected to a coaxial pivot point of the channel steel that is spaced apart from the axis. (7) The boat drive device according to claim (1), wherein the first axis and the second axis do not intersect. (8) The boat drive device according to claim (1), wherein the first axis is vertical.